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Welcome to Guildline

Guildline Instruments is an Engineering Company that designs, manufactures and markets ultra-precise instruments for the fields of metrology and oceanography. Since 1957 our products have been used for research and as the primary instrument with respect to establishing traceability to fundamental electrical standards. Key customer markets include national research laboratories, national metrology institutes, calibration laboratories, militaries, nuclear power plants, aerospace, and companies in the electrical and power industry.

guildline logo 50years

Most Guildline instruments are unique and represent the only commercially available instrument capable of uncertainties/accuracy in the sub parts-per-million range. The team of Guildline engineering and manufacturing experts is recognized around the world for the performance and quality of the Company’s products. Most Guildline Instruments and Standards remain in use for 20 to 50 years – performance and quality that customers depend on!

Contact Guildline to assist you in overcoming all of your measurement challenges. Performance and quality for over 60 years!

What's New

  • 4130 Automated Artifact Standard

    GUILDLINE INSTRUMENTS 4130 AUTOMATED ARTIFACT STANDARD is the latest innovation in DC Standards. The 4130 Standard contains a 10 VDC Zener based voltage source and two precision resistance standards, all operating inside a temperature controlled and EMI shielded chamber. The new Guildline 4130 Artifact Standard is fully automated with a color touch screen, and provides IEEE and USB interfaces 

    Download the Datasheet:

    33290-00-85_ZA4130.pdf